Differential lock control method, differential lock control system and differential lock assembly

The invention relates to the technical field of automobile running systems, and discloses a differential lock control method and a differential lock control system. The system comprises a differential lock switch, a central controller and a differential lock electromagnetic gas valve, wherein the central controller is used for outputting a control signal to the differential lock electromagnetic gas valve according to the state of the differential lock switch and the state of the speed of an automobile; and the differential lock electromagnetic gas valve is used for driving or prohibiting the operation of a differential lock according to the control signals outputted by the central controller. Through the adoption of the system, the differential lock can be automatically controlled, and the problem that the teeth of the differential lock are broken due to a human factor, is solved. The invention also discloses a differential lock assembly.